Gas burner

ABSTRACT

The gas burner comprises a duct for the forced delivery of air. The duct contains a gas-feeding pipe with radial openings for the outlet of the gas. The pipe at the end facing inside the duct is closed with a plug having axial openings for the outlet of the gas. In addition, the pipe is provided with a gas-distributing valve having radial openings and axial openings for the outlet of the gas. The radial openings in the gas-feeding pipe coincide with the radial openings in the gas-distributing valve. The latter valve is rotatable about its longitudinal axis. The axial openings in the gas-distributing valve are so arranged that upon rotation of the valve its axial openings coincide with those of the plug, while the radial openings in the gas-feeding pipe are closed by the gas-distributing valve.

UnitedStates Patent [191 Akhmedov et al.

[ Nov. 20, 1973 GAS BURNER 22 Filed: Aug. 1, 1972 21 Appl. N0.: 277,038

[52] US. Cl 431/280, 431/354, 239/414, 239/425 [51] Int. Cl. F23q 9/08 [58] Field of Search 431/177, 178, 280, 431/281, 284, 285, 353, 354; 239/414, 415, 425

[56] References Cited FOREIGN PATENTS OR APPLICATIONS Germany 239/414 Primary Examiner-Carroll B. Dority, Jr. Attorney-Eric I-I. Waters et a1.

[5 7] ABSTRACT The gas burner comprises a duct for the forced deliv:

ery of air. The duct contains a gas-feeding pipe with radial openings for the outlet of the gas. The pipe at the end facing inside the duct is closed with a plug having axial openings for the outlet of the gas. In addition, the pipe is provided with a gas-distributing valve having radial openings and axial openings for the outlet of the gas. The radial openings in the gas-feeding pipe coincide with the radial openings in the gasdistributing valve. The latter valve is rotatable about its longitudinal axis. The axial openings in the gas distributing valve are so arranged that upon rotation of the valve its axial openings coincide with those of the plug, while the radial openings in the gas-feeding pipe are closed by the gas-distributing valve.

1 Claim, 5 Drawing Figures GAS BURNER The 'present invention relates to burner equipment for firing gas with control of the length and luminosity of the flame, and more particularly to gas burners.

The present invention can be successfully used for boiler units, industrial furnaces and gas turbines.

There is already known a gas burner with control of the length and luminosity of the flame.

The gas burner has a duct for the forced delivery of air. The duct contains a central gas-feeding pipe with radial openings for the outlet of the gas. The openings are arranged in rows, and the further each row is from the end of the gas-feeding pipe, the smaller is the number of openings in it, and the greater is the diameter of each opening. A gas-distributing valve with sector slots is installed inside the gas-feeding pipe. The gasdistributing valve moves in an axial direction to ensure the outlet of the gas through one row of openings. When the gas is fed into the central gas-feeding pipe it flows through the sector slots and passes out from one row of radial openings. The jets of gas flowing out of the openings of the gas-distributing pipe mix with the air supplied from the duct. A gas-air mixture is formed, upon the combustion of which a flamge is obtained. The length and luminosity of the flame can be changed by changing the conditions of gas and air mixing.

The length and luminosity of the flame have to be changed in order to create the optimal conditions of gas combustion for each type of gas-firing unit, and also to maintain constant outlet parameters of the gas-firing unit upon a change in its output.

For example, when gas flowing out through a great number of radial small-diameter openings in the gasdistributing pipe mixes with the air delivered from the duct, a gas-air mixture is formed whose combustion produces a long luminous flame.

When gas flowing out through a small number of radial large-diameter openings in the gas-distributing pipe mixes with the air delivered from the duct, a gasair mixture is formed whose combustion produces a short non-luminous flame.

The known gas burner, however, allows the length and luminosity of the flame to be controlled only within a limited range.

The jets of gas leaving the radial openings of the gasfeeding pipe are perpendicular to the stream of air flowing in from the duct. The mutually perpendicular streams of gas and air mix very well, which prevents the obtaining of long luminous flames.

The object of the present invention is to provide a gas burner that would ensure control of the length and luminosity of the flame w'ithin broad limits.

This object is achieved by providing a gas burner comprising a duct for the delivery of air containing a central gas-feeding pipe with radial openings for the outlet of the gas, the pipe being closed at the end facing inside the duct with a plug and having a gas-distributing valve whose radial openings for the outlet of the gas coincide with the radial openings of the gas-feeding pipe, wherein, according to the invention, the plug of the gas-feeding pipe has axial openings for the outlet of the gas, while the valve is rotatable about its longitudinal axis and is provided with axial openings so arranged that upon rotation of the gas-distributing valve its axial openings coincide with the axial openings of the plug,

while the radial openings of the gas-feeding pipe are closed by the gas-distributing valve.

Such a design of the gas burner ensures control of the length and luminosity of the flame within broad limits. Rotation of the valve ensures, for example, coincidence of the radial openings in the gas-distributing valve with .the radial openings in the gas-feeding pipe, while the axial openings of the plug in the gas-feeding pipe are closed by the valve. In the above position of the gasdistributing valve the gas and air streams are mutually perpendicular.

The mutually perpendicular streams of gas and air mix very well and a gas-air mixture is formed. The flame formed upon combustion of the gas-air mixture has the minimum length and luminosity.

Rotation of the valve ensures, for example, coincidence of the axial openings in the gas-distributing valve with the axial openings in the gas-feeding pipe, while the radial openings in the gas-feeding pipe are closed by the valve. With such a position of the gasdistributing valve, the gas and air streams are parallel. These streams mix poorly. The flame formed upon the combustion of this gas-air mixture has the maximum length and luminosity.

In intermediate positions of the gas-distributing valve any proportion between the opening of the radial and axial openings of the plug and the gas-feeding pipe can be established, which makes it possible to change the distribution of the amount of gas flowing out of the radial and axial openings of the plug and gas-feeding pipe, and thus smoothly control the length and luminosity of the flame within broad limits.

The gas burner according to the present invention with control of the length and luminosity of the flame ensures the optimal conditions of gas combustion for every type of gas-firing unit, for example, for boiler units, industrial furnaces and gas turbines. Optimization of the conditions of combustion increases the efficiency of the gas-firing unit by eliminating losses due to incomplete chemical combustion and reducing losses with the flue gases.

In addition, the gas burner maintains constant design outlet parameters of gas-firing installations, for example, the steam superheating temperature in a boiler unit, while its output may vary within broad limits. This gas burner is used for firing gases with a variable heating value, since it maintains a constant length and luminosity of the flame upon a change in the composition of the gas.

The installation of a burner according to the present invention with control of the flame length and luminosity of a water-tube boiler unit increased its efficiency by 2.05 percent.

The gas burner creates a practically unlimited number of variants of flames differing in their length and luminosity.

The other objects and advantages of the present invention will become more fully apparent from a consideration of an exemplary embodiment thereof, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic longitudinal section of the gas burner according to the invention;

FIG. 2 is a longitudinal section of the unit of gas outflow from the gas-feeding pipe when the radial open ings in the gas-distributing valve coincide with the radial openings in the gas-feeding pipe;

FIG. 3 is a section through IIIIII of FIG. 2;

FIG. 4 is a longitudinal section of the unit of gas outflow from the gas-feeding pipe when the axial openings in the gas-distributing valve coincide with the axial openings in the plug of the gas-feeding pipe;

FIG. is a section through V-V of FIG. 4.

The gas burner has duct 1 (FIG. 1) for the forced delivery of air. Duct 1 contains a gas-feeding pipe 2 with radial openings 3 (FIG. 2) for the outlet of the gas. Pipe 2 is closed with plug 4 at its end facing inside duct 1 (FIG. 1). In addition, pipe 2 is provided with gasdistributing valve 5 (FIG. 2) provided with radial openings 6 and axial openings 7 (FIG. 3) for outlet of the gas. Plug 4 (FIGS.4,5) has axial openings 8 for outlet of the gas. Radial openings 3 (FIGS.2,3) of gas-feeding pipe 2 coincide with radial openings 6 of gasdestributing valve 5. Gas-distributing valve 5 (FIG. 1) is rotatable about its longitudinal axis. Secured on valve 5 is toothed sector 9 that engages with gear wheel 10 secured on shaft 11.

The gas burner functions as follows.

Air for combustion is deliverd through duct 1. Gas is delivered into gas-feeding pipe 2. When shaft 11 turns, gear wheel 10 engaging with toothed sector 9 so turns the gas-distributing valve that radial openings 6 (FIGS. 2,3) of gas-distributing valve 5 coincide with radial openings 3 of gas-feeding pipe 2, while axial openings 8 of plug 4 of gas-feeding pipe 2 are closed by gasdistributing valve 5. The gas flows through radial openings 3 (FIG.1) of gas-feeding pipe 2 and flows out of it perpendicular to the stream of air. The mutually perpendicular streams of gas and air mix very well, and a gas-air mixture is formed. The flame formed upon the combustion of this gas-air mixture has a minimum length and luminosity.

Upon further rotation of shaft 11, gear wheel 10 engaging with toothed sector 9 so turns gas-distributing valve 5 that radial openings 3 (FIGS. 4,5) of gasfeeding pipe 2 are closed by gas-distributing valve 5, while axial openings 8 of plug 4 of gas-feeding pipe 2 coincide with axial openings 7 of gas-distributing valve 5. The gas flows through axial openings 8 in plug 4 of gas-feeding pipe 2 and flows out of them parallel to the stream of air. The gas and air mix and form a gas-air mixture. The flame formed upon the combustion of this gas-air mixture has the maximum length and luminosity.

Any relation between the opening of radial openings 3 in gas-feeding pipe 2 and axial openings 8 in plug 4 of gas-feeding pipe 2 will be established in intermediate positions of gas-distributing valve 5 (FIG.1). This makes it possible to redistribute the amount of gas flowing out of gas-feeding pipe 2 and thus smoothly control the length and luminosity of the flame within wide limits.

What we claim is:

1. A gas burner, comprising: a duct for the delivery of air; a gas-feeding pipe with radial openings for the outlet of gas arranged inside said duct; a plug closing said gas-feeding pipe at the end facing inside said duct, and provided with axial openings for the outlet of the gas; a gas-distributing valve arranged inside said gasfeeding pipe, said valve being rotatable about its longitudinal axis, said valve being provided with radial openings for the outlet of the gas coinciding with said radial openings in said gas-feeding pipe, and with axial openings for the outlet of the gas so arranged that upon rotation of said gas-distributing valve, the said axial openings thereof coincide with said axial openings in said gas-distributing plug, said radial openings of said gasfeeding pipe being closed by said gas-distributing valve. 

1. A gas burner, comprising: a duct for the delivery of air; a gas-feeding pipe with radial openings for the outlet of gas arranged inside said duct; a plug closing said gas-feeding pipe at the end facing inside said duct, and provided with axial openings for the outlet of the gas; a gas-distributing valve arranged inside said gas-feeding pipe, said valve being rotatable about its longitudinal axis, said valve being provided with radial openings for the outlet of the gas coinciding with said radial openings in said gas-feeding pipe, and with axial openings for the outlet of the gas so arranged that upon rotation of said gas-distributing valve, the said axial openings thereof coincide with said axial openings in said gas-distributing plug, said radial openings of said gas-feeding pipe being closed by said gas-distributing valve. 